Faulted Fan Relay – The Blower That Won’t Listen

When your thermostat says “fan on” but nothing happens—or it won’t shut off at all—a stuck relay is often to blame.
Chatterbox correlates fan command signals with actual current draw. If the fan draws power when it shouldn’t, we identify a stuck relay immediately.
Replacing it restores normal fan operation and prevents wasted electricity from a blower that never rests.